GB 38468-2019 PDF English
US$265.00 · In stock · Download in 9 secondsGB 38468-2019: Limit of harmful substances of interior floor coatings Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 38468-2019 | English | 265 |
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Limit of harmful substances of interior floor coatings
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GB 38468-2019: Limit of harmful substances of interior floor coatings---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB38468-2019
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 87.040
G 51
Limit of harmful substances of interior floor coatings
Issued on. DECEMBER 31, 2019
Implemented on. JULY 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 5
4 Product classification... 6
5 Requirements... 6
6 Test methods... 7
7 Inspection rules... 8
8 Package marks... 9
Appendix A (Normative) Test of volatile organic compounds content, total
content of benzene, toluene, ethylbenzene and xylene, and total content of
glycol ethers and ether esters in water-based floor coatings - gas
chromatography... 10
Appendix B (Normative) Test of moisture content... 18
Appendix C (Normative) Test of volatile organic compounds (VOC) content in
solvent-based and solvent-free floor coatings... 25
Appendix D (Normative) Test of benzene content, toluene, ethylbenzene and
xylene content, as well as glycol ethers and ether esters content in solvent-
based and solvent-free floor coatings - gas chromatography analysis... 27
1 Scope
This Standard specifies the terms and definitions, product classification,
requirements, test methods, inspection rules and package marks etc. involved
in the allowable limits of substances harmful to humans and the environment in
interior floor coatings.
Note. Interior refers to the inside of places where the top is blocked or the top and the
surroundings are blocked, such as industrial plants, underground parking lots,
hospitals, schools, gymnasiums and other places. It is relative to places where the
top and the surroundings are not blocked.
This Standard applies to various interior floor coatings with organic polymers
as the main adhesives, which are painted on the base surface of floors such as
cement mortar, concrete, stone, plastic or steel, for decorating and protecting
the ground and other special functions (such as antistatic, corrosion resistance,
anti-skid, etc.); including primers, mid-coats, topcoats and finishes.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
GB/T 1725-2007 Paints, varnishes and plastics - Determination of non-
volatile-matter content
GB/T 3186 Paints, varnishes and raw materials for paints and varnishes -
Sampling
GB/T 6682 Water for analytical laboratory use - Specification and test
methods
GB/T 6750-2007 Paints and varnishes - Determination of density -
Pycnometer method
GB/T 8170-2008 Rules of rounding off for numerical values and expression
and judgement of limiting values
GB/T 9750 Marks for package of coating products
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Volatile organic compounds; VOC
Any organic liquid and/or solid which can evaporate naturally under the normal
temperature and pressure of the atmospheric environment in which it is
exposed.
3.2
Volatile organic compounds content; VOC content
The mass of volatile organic compounds in the coatings measured under the
specified conditions.
3.3
Water-based floor coatings
The floor coatings which use water as the main dispersion medium.
3.4
Solvent-based floor coatings
The floor coatings which use non-active organic solvents as the main dispersion
medium.
4 Product classification
This Standard divides interior floor coating products into three categories.
5 Requirements
The limit of harmful substances in interior floor coating products shall meet the
requirements of Table 1.
6 Test methods
6.1 Sampling
The product is sampled according to GB/T 3186, or according to the agreed
method. The sampling amount is determined according to the inspection needs.
6.2 Test methods
6.2.5 The test of formaldehyde in water-based floor coatings is carried out
according to the provisions of GB/T 23993-2009.
6.2.6 The total content of free diisocyanates (TDI and HDI) is tested in
accordance with GB/T 18446-2009.
6.2.7 For the sum of phthalates, prepare mixed samples according to the
construction proportion indicated by the product; then test according to the
provisions of Appendix C in GB 24613-2009; convert it to the content in the dry
coating film.
7 Inspection rules
7.1 Type inspection items
7.1.1 All the requirements listed in this Standard are type inspection items.
Under normal production conditions, type inspection shall be carried out at least
once a year.
7.1.2 Type inspection shall be carried out at any time in one of the following
situations.
7.2 Determination of inspection results
7.2.1 The determination of inspection results is carried out according to the
rounding value comparison method in GB/T 8170-2008.
8 Package marks
8.1 For the product package marks, in addition to meeting the requirements of
GB/T 9750, products that pass the inspection according to this Standard can
be clearly indicated on the package marks.
8.2 For floor coating products composed of bi-component or multi-component,
the construction proportion of each component shall be specified on the
package mark or in the product manual.
Appendix A
(Normative)
Test of volatile organic compounds content, total content of benzene,
toluene, ethylbenzene and xylene, and total content of glycol ethers and
ether esters in water-based floor coatings - gas chromatography
A.1 Scope
A.3 Materials and reagents
A.3.1 Carrier gas. nitrogen or helium; purity is ≥99.995%.
A.3.2 Fuel gas. hydrogen; purity is ≥99.995%.
A.3.3 Combustion-supporting gas. air.
A.3.4 Auxiliary gas (septum purge and makeup gas). nitrogen with the same
properties as the carrier gas.
A.4 Instruments and equipment
A.4.1 Gas chromatograph with the following configuration.
A.4.2 Injector. micro-syringe. The capacity is at least twice the injection volume.
A.4.3 Sample preparation bottle. about 20 mL glass bottle with a sealable cap.
A.4.4 Balance. Accuracy is 0.1 mg.
A.5 Test conditions of gas chromatography
A.6 Test procedures
A.6.1 General
All tests are carried out in two parallel determinations.
A.6.2 Density
The density test is carried out according to GB/T 6750-2007.The test
temperature is (23±2)°C.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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